998855458 has 16 divisors (see below), whose sum is σ = 1515977856. Its totient is φ = 493548400.

The previous prime is 998855453. The next prime is 998855461. The reversal of 998855458 is 854558899.

It is a junction number, because it is equal to n+sod(n) for n = 998855396 and 998855405.

It is not an unprimeable number, because it can be changed into a prime (998855453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109335 + ... + 118117.

It is an arithmetic number, because the mean of its divisors is an integer number (94748616).

Almost surely, 2^998855458 is an apocalyptic number.

998855458 is a deficient number, since it is larger than the sum of its proper divisors (517122398).

998855458 is a wasteful number, since it uses less digits than its factorization.

998855458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9449.

The product of its digits is 20736000, while the sum is 61.

The square root of 998855458 is about 31604.6746225934. The cubic root of 998855458 is about 999.6183403544.

The spelling of 998855458 in words is "nine hundred ninety-eight million, eight hundred fifty-five thousand, four hundred fifty-eight".